Improvement in machines for breaking stone



l 2 Sheets--Shet l. J. R. 0RD & H. MADDISON.

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J. R. 0RD & H. MADD'ISON 2Sheets--Sheet2.

Improvement in Machines for Breaking Stone.

No, 124,150, Patented Feb.27,1872.

NI'IED STATES PATENT OEEIoE.

JOHN ROBERT 0RD AND HENRY MADDISON, OF DARLINGTON, GREAT BRITAIN.

IMPROVEMENT IN MACHINES FOR BREAKING STONE.

Specification forming part of Letters Patent No. 124,150, dated February27, 1872.

SPECIFICATION.

We, J OHN ROBERT GED and HENRY MAD- DISON, both of Darling-ton, in thecounty of Durham, Kingdom of Great Britain and Ireland, have inventedImprovements in Machinery orApparatus used for Breaking Stone, of whichthe following is a specification:

This invention relates to certain improved apparatus, to be used inconnection with Blakes Stone-Breaker, or other similar machine used forbreaking stone, (or metal, as it is called,) for road-making purposes;and consists, principally, inthe employment, in combination with suchmachines, of one or more pairs of corrugated rollers of chilled iron orsteel, as hereinafter described, through which the stone passes, afterbeing broken by the machine, by which it becomes further broken ormacadamized, and rendered peculiarly fit for road-makin g purposes.

Such being the nature and object of our said invention for improvementsin machinery or apparatus used for breaking stone, in order to enableothers skilled in the art to make and use the same we will now proceedto describe more in detail the manner in which the same is to be or maybe carried into practical efi'eet, which will be readily understood fromthe following explanation thereof, reference being had to the annexeddrawing and to the figures and letters marked thereon.

Figure 1 in the drawing represents a side elevation; Fig. 2, a frontview of a Blakes stone-breaker, showing our improvement as appliedthereto; and Fig. 3 is a plan view, on a larger scale, of a pair of thecorrugated rollers, detached from the machine.

These rollers, a a, are mounted horizontally beneath the jaws of thestone-breaking machine b, so that the stone, as it is roughly broken bythe latter, falls between the two rollars a a, one of which is groovedor corrugated longitudinally and the other is grooved or corrugated inthe direction of the circumference, as shown clearly at Fig. 3, and bymeans of these rollers it becomes further reduced in size. These tworollers are mounted andrevolvein suitable bearings, c c, oneofwhich isfixed and the other is forced against it by means of a powerful weightedlever, d d, or by a strong spring, which allows the movable roller togive way and prevents the breakage of the machine in case any piece ofstone or metal should be too large or too hard to yield to the crushingpower of the corrugated roll- 'ers. From these rollers the broken stoneor metal falls into the revolving inclined screen e e, whereby it isdelivered in diii'erent sizes into wagons or receptacles beneath in theusual manner.

This combined apparatus may be driven in any convenient manner; but weprefer to drive it by the gearing shown in the plan view, Fig. 4. f f isthe fly-wheel shaft of the steam-engine, upon which is keyed aspur-pinion, g 9, driving the corrugated rollers a a by means of thespur-gearing h h. A spur-wheel, i i, gearing into one of theroller-pinions, drives the revolving screen 6 c; the stone-breaker I) I)being driven by means of a strap, h h, passing round a pulley, l l,which is also actuated from the fly-wheel shaft by means of thebevel-gearin g in m.

We would here remark that although for the sake of illustration only onepair of corrugated rollers is shown in the drawiu g, yet two or morepairs of these rollers may be employed if preferred.

Claim.

We claim as our invention- The combination, with a Blakes stonebreaker,or other similar machine used for breaking stone, of a pair or pairs ofcorrugated rollers, one roller of each pair being corrugatedlongitudinally and the other circumferentially, substantially as and forthe purposes hereinbefore described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

JOHN ROBERT 0RD. HENRY MADDISON. Witnesses:

WILL SHARPE, JOHN J. PEMBERTON, Attorneys Clerks, both ofStochton-on-Tees, in

the county of Durham, in the United Kingdom of Great Britain andIreland.

